[dpdk-dev] [PATCH] vhost: fix vhost user virtqueue not accessable

[Marvin Liu]

Log feature is disabled in vhost user, so that log address was invalid
when checking. Add feature bit check can skip useless address check.

Fixes: 04cfc7fdbfca ("vhost: translate incoming log address to gpa")

Signed-off-by: Marvin Liu <yong....@intel.com>
---
 lib/librte_vhost/vhost_user.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 61ef699ac..0407fdc29 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -741,13 +741,15 @@ translate_ring_addresses(struct virtio_net *dev, int 
vq_index)
                vq->last_avail_idx = vq->used->idx;
        }
 
-       vq->log_guest_addr =
-               translate_log_addr(dev, vq, addr->log_guest_addr);
-       if (vq->log_guest_addr == 0) {
-               RTE_LOG(DEBUG, VHOST_CONFIG,
-                       "(%d) failed to map log_guest_addr .\n",
-                       dev->vid);
-               return dev;
+       if (dev->features & (1ULL << VHOST_F_LOG_ALL)) {
+               vq->log_guest_addr =
+                       translate_log_addr(dev, vq, addr->log_guest_addr);
+               if (vq->log_guest_addr == 0) {
+                       RTE_LOG(DEBUG, VHOST_CONFIG,
+                               "(%d) failed to map log_guest_addr .\n",
+                               dev->vid);
+                       return dev;
+               }
        }
        vq->access_ok = 1;
 
-- 
2.17.1